United States Secretary of Health and Human Services Robert F. Kennedy Jr. has enlisted Kid Rock in hopes of promoting a healthier lifestyle - much to the amusement of social media fans. In an Instagram video shared by both Kennedy, 72, and the musician, 55, on Tuesday, February 15, the shirtless duo can be seen implementing various aspects of a "Rock Out Work Out," including hitting the gym and exercising inside a sauna, dining on home-cooked meals, recovering in a cold plunge, playing pickleball and drinking "whole milk" in a spa together. The official U.S.